Lifting hook



D. DAVIES LIFTING HOOK June 28, 1932.

Filed April 1, 1931.

fi avenfar; 541/0 QfiV/ES Patented June 28, 1 932 UNITED STATES PATET 'FFICE DAVID DAVIES, OF CLEVELAND, OHIO, ASSIGNOR TO THE AMERICAN STEEL AND WIRE COMPANY OF NEW JERSEY, A CORPORATION OF NEW JERSEY LIFTING HOOK Application filed April 1,

This invention relates to rod hook apparatus or what are commonly termed hairpin hooks in steel and wire mill practice and which are particularly adapted for picking up and transporting round bundles of wire or rod and like cylindrical or hollow procluots.

The present improved hook apparatus has been designed particularly for use with a 19 crane or carrier which utilizes a boom in lifting and transporting the load from one point to another.

The principal object of the invention is to provide a device or apparatus of the class specified which is simple yet durable in condotted lines.

Figure 2 is a cross-sectional view taken on the line II-II of Figure 1.

The reference numeral 5 designates the boom of a crane, 6 the cable and 7 an anchor or analogous support for the boom, the usual cable winding drum, motor and other operating equipment of the crane not being shown.

The hook, indicated at 8, is of substantial U-shape with one of its legs formed as a. loadengaging prong and the other leg formed with a plurality of pivoting holes 9, by means of which it may be adjustably pivoted to a hanger bracket 10, the latter having the one end of the cable 6 attached thereto, said cable being passed over a grooved pulley 12 mounted on the end of the boom. The hook 8 is preferably pivoted at a point on the upper leg thereof that it will be substantially in equilibrium when loaded with bundles of rods or the like.

1931. Serial No. 527,017.

The body portion of the hook 8 is formed with a shoulder 13, and on this shoulder levers 14 and 15 are pivotally mounted, the lever 14 being resiliently and adj ustably anchored m the support 7 through the medium of a spring 16 and nut 17 and serves to give lateral stability to the motion of the hook 8, while the lever 15 is passed over a grooved roller 18 mounted on the boom 5 and is formed with ratchet teeth 19. A. latch or ratchet stop 20 is pivotally mounted on the boom 5 and is adapted to engage in the teeth 19, a spring 21 holding the latch against lever 15.

The latch 20 is controlled by a trip rod 22,

which is pivotally secured at one end to the said latch and extends back through the support 7 and is provided with a lever 23. By disengaging the latch 20 from the teeth 19 of lever 15, the latter will be permit-ted to move freely over the roller 18.

In operation, assuming the crane to be within reaching distance of the load, the hook may be slipped in a stacked load of Wire or rod bundles by releasing latch 20 and at 1 the same time lowering the hook by means of the cable 6 so that its prong is adjacent the opening in the bundles and then checking the cable while the lever 15 continues to drop.

This causes the prong of the hook to describe an arc and fall into a substantially horizontal position in engagement with the load. If necessary the hook may be advanced further into the load by advancing the crane. IVhen the load is lifted by the cable 6, the open end of thehook raises first and the lever 15 is caused to travel upwardly on its roller, the latch 20 holding it at the desired height. The hook is now in carrying position with its prong substantially horizontal. To dis-.

charge the load, the cable is released and the hook 8 pivots about the shoulder 13 and the prong falls at a relatively sharp angle, In this position the hook is again ready for loading by disengaging ing the cycle.

I claim: I

1. Apparatus of the class specified comprising, in combination, a. supporting structure, a boom fixed to and extending upwardly and outwardly from said support, a U

latch 20 and repeatshaped hook having a load-engaging prong, a flexible member attached to one leg of said hook and passing over said boom for raising and lowering said hook, a lever having one end pivotally secured to said hook and having its other end connected to said support so as to provide for pivotal movement and for movement in a direction parallel to the longitudinal axis of said lever, a second lever pivotally connected to said hook on the same axis as said first named lever and extending upwardly through said boom, said last named lever being provided with ratchet teeth along its one face, a ratchet pivotally mounted on said boom and adapted to engage in the teeth on said lever to hold said lever against downward movement, a spring normally urging said ratchet toward said teeth on said lever, and manually operated trip mechanism for releasing said ratchet.

2. Apparatus of the class specified comprising, in combination, a supporting structure, a boom fixed to and extending upwardly and outwardly from said support, a U-shaped hook having a load-engaging prong, a flexible member attached to one leg of said hook and passing over said boom for raising and lowering said hook, a lever having one end pivotally secured to said hook and having its other end resiliently and adjustably anchored to said support, a second lever pivotally connected to said hook on the same axis as said first named lever and extending upwardly through said boom, said last named lever being provided with ratchet teeth along its one face, a ratchet pivotally mounted on said boom and adapted to engage in the teeth on said lever to hold said lever against downward movement, means for normally urging said ratchet toward said teeth on said lever, and means for releasing said ratchet from said teeth.

3. Apparatus of the class specified comprising, in combination, a supporting structure, a boom fixed to and extending upwardly and outwardly from said support, a U- shaped hook having a load-engaging prong, a flexible member attached to one leg of said hook and passing over said boom for raising and lowering said hook, a lever having one end pivotally secured to said hook and having its other end resiliently and adjustably anchored to said support, a second lever pivotally connected to said hook on the same axis as said first named lever and extending upwardly through said boom, and releasable means for locking said last named lever at selective vertical positions relative to said boom.

In testimony whereof, I have hereunto set 7 my hand.

DAVID DAVIES. 

